Standard Specification for Free-Machining Stainless Steel Bars
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| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | A 582 S44023 | Martensite | USA - SAE , A 582/A 582M (2012) | |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.95 | 1.20 | ||
| Mn | - | 1.25 | ||
| Si | - | 1.00 | ||
| P | - | 0.04 | ||
| S | - | 0.03 | ||
| Cr | 16.00 | 18.00 | ||
| Ni | - | 0.75 | ||
| Mo | - | 0.60 | ||
| Se | - | 0.15 |
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 162 (≥) | 232 (≥) | 43 | 12 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 212 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 627 (≥) | 379 (≥) | 12 | 23 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 233 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 484 | 267 | 938 |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |
| Grade | Standard | Country | Application |
|---|---|---|---|
| A 582 S44020 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44020 | AISI | USA | Martensitic Chromium Free Machining Stainless Steel |
| A 582 S44023 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44023 | AISI | USA | Martensitic Chromium Selenium Bearing Free Machining Stainless Steel |
| A 582 S44020 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44020 | AISI | USA | Martensitic Chromium Free Machining Stainless Steel |
| A 582 S44023 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44023 | AISI | USA | Martensitic Chromium Selenium Bearing Free Machining Stainless Steel |
| SUS 440F | JIS | Japan | Stainless steel bars |
| STS440F | KS | Korea | Stainless steel bars |
| 440F | CNS | China | Stainless steel bars |
| AISI440F | AISI | USA | AISI440F |
| AISI440F Se | AISI | USA | AISI440F Se |
| Y1Cr18Ni9Se | GB | China | Improve the machinability, ablation resistance. Suitable for automatic lathe production of rivets, screws |
| 303Se | YB | USA | Stainless and heat resisting steels |
| A 314 303Se | SAE | USA | Stainless and heat resisting steels |
| A 473 303 Se | SAE | USA | Austenitic stainless steel forgings for general use |
| A 511 MT303Se | SAE | USA | Austenitic stainless steel forgings for general use |
| A 581 Type 303Se | SAE | USA | Free machining stainless and heat resisting steel wire |
| A 582 Type 303Se | SAE | USA | Free-machining stainless steel bars |